David Shale / Paper argonaut (Argonauta sp) Gulf of Mexico, deep sea species

Fred Bavendam / Paper Nautilus (Argonauta nodosa) is actually a pelagic Octopus, females make the parchment-like shell to carry incubating eggs, South Australia

Alex Mustard / Paper nautilus (Argonauta hians) attaches onto a piece of plastic in open water at night. Anilao, Batangas marine protected area, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean...

Alex Mustard / Paper nautilus (Argonauta hians) in open water at night. Anilao, Batangas marine protected area, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

Hanne & Jens Eriksen / Brown paper nautilus (Argonauta hians) on beach where found, Oman, October

Solvin Zankl / Paper nautilus (Argonauta argo) male, the males have no shell and only mate once. Deep sea species from Atlantic Ocean off Cape Verde. Captive.

D. Parer & E. Parer-Cook / Paper Nautilus (Argonauta nodosa) hatchlings in front of parent shell, Port Phillip Bay, Victoria, Australia

D. Parer & E. Parer-Cook / Paper Nautilus (Argonauta nodosa) hatchlings, Port Phillip Bay, Victoria, Australia

D. Parer & E. Parer-Cook / Paper Nautilus (Argonauta nodosa) female with eggs on side of shell ready to hatch, Port Phillip Bay, Victoria, Australia

D. Parer & E. Parer-Cook / Paper Nautilus (Argonauta nodosa) on sand bottom, Port Phillip Bay, Victoria, Australia

D. Parer & E. Parer-Cook / Paper Nautilus (Argonauta nodosa) mouth, siphon and eye, Port Phillip Bay, Victoria, Australia

D. Parer & E. Parer-Cook / Paper Nautilus (Argonauta nodosa) on sand bottom, Port Phillip Bay, Victoria, Australia